Simos has already answered this question on https://discuss.linuxcontainers.org/t/limiting-disk-io-on-lxd-containers/261
I have also copied the answer on https://serverfault.com/questions/858873/limiting-disk-io-on-lxd-containers In short: it works wtih ZFS and btrfs storage backend. * Ivan Ogai <[email protected]> [2017-07-04 16:38]: > Greetings LXCers/LXDers > > Just in case: I have also posted this question in discuss and > serverfault. By getting an answer here or there, I will answer the > others of course for everyone to find them. References at the end. > > > I have tried without success to limit the disk IO of a LXD container named > *ci* with: > > lxc config device set ci root limits.read 30MB > lxc config device set ci root limits.write 10MB > > However, when running e.g. this command on the container: > > dd if=/dev/zero of=/root/testfile bs=1G count=10 oflag=direct > > the result is the whole capicity of the disk, which is about **130MB/s**, > instead of the expected result of about **10MB/s** for writing operations: > > 10737418240 bytes (11 GB, 10 GiB) copied, 81,3877 s, 132 MB/s > > This is also confirmed by `atop` running on the host. > > **How can I effectively limit the disk IO of the container, so that no matter > what happens on it, the host disk performance is not overcommitted**? > > On a second test, I run the same *dd* command as above at the same time on the > guest and on the host, but the host is not prioritized either. > > > Some additional information: > > - Host and guest are Ubuntu 16.04 > - The server has two hard disks with equal partitions, joined in RAID 1 arrays > - On top of the biggest RAID array the root filesystem is mounted on a LVM > volume group > > root@server ~ # lvs > LV VG Attr LSize > root vg0 -wi-ao---- 2,72t > swap vg0 -wi-ao---- 4,00g > > - The LXD storage backend is *dir* > > I could partitition the disk differently if that could help limiting disk IO > of the container, e.g. having a RAID array dedicated to ZFS for LXD. **Would > that help**? > > > Question references: > https://discuss.linuxcontainers.org/t/limiting-disk-io-on-lxd-containers/261 > https://serverfault.com/questions/858873/limiting-disk-io-on-lxd-containers > > -- > Ivan _______________________________________________ lxc-users mailing list [email protected] http://lists.linuxcontainers.org/listinfo/lxc-users
